Test Results of the Superconducting Solenoids Series Production for the SARAF-Linac Project

In the framework of the SARAF (Soreq Applied Research Accelerator Facility) project, CEA is in charge of the design, fabrication and commissioning of a superconducting linac accelerating up to 5 mA beams of either protons from 1.3 to 35 MeV or deuterons from 2.6 to 40 MeV. The superconducting Linac is composed of four 5 meter long and 2.1 meter high cryomodules. The first two cryomodules are composed of six or seven accelerating cavities and six superconducting solenoid packages while the two last cryomodules are composed of seven cavities and four solenoid packages. Each solenoid package is composed of a focusing solenoid with its two shielding coils and two pairs of steering coils to control the beam trajectory. The focusing solenoids have been designed to produce 6.31 T at the center while the steering coils generate horizontal and vertical fields of 0.1 T at the same point. The prototype was manufactured in industry and qualified in 2019 at CEA. Then 20 solenoid packages and 2 spares have been manufactured and all tested at 4.45 K before being assembled in the cryomodules. We report here the status of the series production and test of the solenoid packages. The manufacturing difficulties, the magnetic performances of the magnets and the cryomodules assembly and test will also be presented.